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        Rave Micro profile biplane

#1 keven64 Feb 12, 2005 11:59 AM

Micro profile biplane
 
Inspired by the many varied 3D foamy models that can be seen within this forum, I have today been creating one of my own - for my Feigao BLIPS with DXA B-ratio gearbox.

http://static.rcgroups.com/gallery/d...34P1010003.JPG

Wingspan is only 20 3/4"
The propeller in the picture is an 8043.
Interplane struts from balsa will be added after the colour trim.

Keven. :)

#2 keven64 Feb 12, 2005 12:19 PM

The model is all 3mm depron - but for the vertical fuselage component - which is from 6mm depron, and the rudder - which is ex foamboard, and 5mm thick.

The the output shaft of a GWS DXA gearbox is offset 3mm from the face of the stick onto which it is pushed.

This I used to my advantage, and have stuck the motor stick directly to the right hand side of the fuselage, bringing the thrustline right onto the centreline of the profile fuselage. :D

http://static.rcgroups.com/gallery/d...34P1010006.JPG

Four Tower Pro 5g servos are now fitted, along with Phoenix10 and a GWS Naro6 receiver.
Weight with a 2S-750 lipo in the slot over the lower wing... but with no colour trim or undercarriage, is only 6oz. :D

More pics after I make the control connections.

Keven. :)

#3 snolord1 Feb 12, 2005 12:25 PM

Good job Keven,looks good.Can't wait for the finished product....keep us posted.

Angel

#4 dougmontgomery Feb 12, 2005 04:09 PM

Great work! keep it up....Doug

#5 SebastianS Feb 13, 2005 12:17 PM

Nice biplane :) But I think it's a little bit to heavy...
For comparison only, this is my Miniulti.

http://www.scheinig.com/bilder2/ulti11.jpg

Wingspan 45cm (ca. 17 3/4")
weight: 83gr (ca. 2 7/8oz)
motor: CDR with an 6x3" GWS

With this weight it flys very good include all 3D aerobatics. The same biplane with 50cm (20") and 125gr (4 3/8oz) was not so good in aerobatic. Only thing what it could better than the new one was flying when it was windy.

#6 keven64 Feb 13, 2005 03:03 PM

Quote:

SebastianS commented
Nice biplane :) But I think it's a little bit to heavy...
Me too :o

Wow - that is light.

Nevertheless I will fnish it, and see how well it goes. :)

The Feigao is a very capable little motor - and I am a rather incapable '3D' pilot. Between the two I might manage to have it going rather well within the flight envelope I can cope with...! ;)

It looks like the model will weight about 7.5oz when done - this motor and gearbox can easily manage that with the correct propeller. A 9070 will make for very interesting flying at almost 7oz static.
I'd better buy new bicycle clips...

Keven. :)

#7 STRINGFLY Feb 13, 2005 06:13 PM

neat.
 
1 Attachment(s)
Looks cool keven64. I like your size. My snoopylution is 28 span. AUW is 7.4 with the Fiego in a B gear box with a 450 3cell. Great flyer.....
STRINGFLY <>+++++

#8 keven64 Feb 14, 2005 01:05 AM

STRINGFLY,

I love the Snoopylution ! :) I originally had my B ratio BLIPS in a 24" monoplane, HERE, and thought that going smaller would be prudent.
Perhaps I was wrong ?

I have only a pair of 2S-750's with which to play at the moment; I'll bet that these are the same weight as your 3S-450's... at only 1 1/4oz each ?

There's the upgrade, before I even begin flying... ;)

Keven. :)

#9 keven64 Feb 14, 2005 02:31 AM

Previous to the 24" model in the above link, I made a monoplane of 28" - which flew GREAT, but was rather fast !
HERE

I think my next will be another bipe of the same size as the Snoopylution :cool:

Lower wing loading = slower flying... ;)

Keven. :)

#10 SebastianS Feb 14, 2005 01:20 PM

hi Keven,

pay attention to the 0970, its very big for a such small plane...
Mine had an 0630 and the old one (the bipe with 20") had an 0845. The 6" is a bit to small for easy torque rolls, but the 8" had almost to much torque, so if you accelerate to fast it made a 1/4 roll :eek:

@stringlfy: the design on your snoopylution looks cool :) is it airbrushed?

#11 keven64 Feb 15, 2005 01:32 AM

I did say "interesting"... ;)

Keven. :D

#12 SebastianS Feb 15, 2005 01:58 PM

http://static.rcgroups.com/forums/im...es/biggrin.gif http://static.rcgroups.com/forums/im...es/biggrin.gif http://static.rcgroups.com/forums/im...es/biggrin.gif

Sebastian

#13 RobinBennett Feb 15, 2005 02:54 PM

> Nice biplane But I think it's a little bit to heavy...

It'd be fine outdoors, but rather fast indoors.

I extended the chord on my bipe to about 9 inches (it has a 23 inch wingspan) - it looks cartoonish but it's the slowest flyer at the indoor events I attend and weighs about 5.5oz - wing loading is about 2oz/sqr foot

I wish I could manage to build an 83g plane - that's amazing. My lightest battery and CDR would be half of that on their own.

#14 SebastianS Feb 15, 2005 02:58 PM

battery + CDR are around 29gr ;)

Sebastian

#15 keven64 Feb 16, 2005 02:41 AM

Robin,

I have nowhere to fly indoors... :rolleyes:
Unless you count the living room - which the missus does not ! ;)

Sebastian,

What specs is your lightweight CDR ?
(edit)
It's not one of those 10g motors from Stout-Aero... or is it ? :eek:
Stout Aero 10g motors
(edit)

I rewound a gobrushless CDR yesterday morning with 14T of 26awg in three colours :o - Wye.
It goes great on 2S with a 6" x 4" prop. :)
I'm not sure it is suitable for anything like this biplane - even a smaller one - but I do have an idea for something...

Keven. :)


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